| dc.description.abstract | Motor deficits of the affected upper limb after stroke after up to two-thirds of stroke patients and conventional rehabilitation aims at reducing upper limb impairment , but significant variability exists between patients regarding rehabilitation efficacy. To date , the mechanisms induced by rehabilitation that can mediate the recovery process are not fully understood. What is brain after stroke change by rehabilitation? Recently , many experts used technologies (electroencephalograph, magnetoencephalography, magnetic resonance imaging, etc.) and correlation methods to investigate the change of rehabilitation. In these literatures, motor-task in methods was mainly finger motor. We are curious about whether the similar results between upper limb motor task and finger motor task or not. Moreover, difference frequency bandwidths of brain oscillation are played difference roles in motor separately .But it has not been discuss yet whether the change is difference of frequency bandwidths after rehabilitation or not. In this study , we discuss the functional connective changes of patients’ brain in different frequency bandwidths after rehabilitation. 16 stroke were recruited and underwent a conventional or virtual reality rehabilitation program with the frequency of 1 hour per day, five days a week. Before and after the rehabilitation, EEG data. EEG data was processed using the Morlet wavelet trans-
formation to generate the time-frequency representation of signals. Time-frequency maps after Morlet wavelet encompassing the α(8-12 Hz),β(16-25Hz) and γ(25-45 Hz) activities were created separately by averaging across trails and divided into 5 time windows. We used mutual information and bi-serial correlation coefficient to compared with functional connective changes before and after rehabilitation. We found that patients′ functional connectivity was decrease after rehabilitation. Because the reorganization of brain network was tended to be stable after rehabilitation. By difference rehabilitation, functional connective changes were difference in α band and β band. And in different windows, functional connective changes were significant difference. | en_US |